Web History (PRIM_WEB.History)

Browser History object

Ancestors - Object (PRIM_OBJT)


History provides access to the browser history.
Manipulation of the browser history is limited to the currently active domain and is effectively a place to store QueryStrings that will be appended to the URL.
This is primarily useful for storing deeplinking information generated by user navigation.


In this example, every time an item in a list gets focus the details of an employee are displayed and an item is added to the history.
When the user uses the history to show a page, the URLChanged event can be monitored and the URLParameters processed to detect the employee number.
Evtroutine Handling(#List.ItemGotFocus)
   #Com_owner.Activate( #Empno )
   #Sys_Web.history.Add( ("Employee=&1").Substitute( #Empno ) )
Evtroutine Handling(#sys_web.URLChanged)
   For Each(#Parameter) In(#sys_web.URLParameters)
      Continue If(#Parameter.Name.Uppercase <> Employee)
      #Com_owner.Activate( #Parameter.Value.uppercase)


ComponentClassNameComponentClassName is the name of the component's class. Inherited from Object (PRIM_OBJT)
ComponentMembersComponentMembers provides access to all the member components of this component Inherited from Object (PRIM_OBJT)
ComponentPatternNameComponentPatternName is used to qualify the class of the component. Inherited from Object (PRIM_OBJT)
ComponentTagGeneric space allowing a value to be stored for the instance Inherited from Object (PRIM_OBJT)
ComponentTypeComponentType gives you access to the type information about the component Inherited from Object (PRIM_OBJT)
ComponentTypeNameComponentTypeName is the fully qualified name of the component's class. Inherited from Object (PRIM_OBJT)
NameName identifies the component Inherited from Object (PRIM_OBJT)
OwnerOwner owns this component Inherited from Object (PRIM_OBJT)
ParentThe component instance to which this instance is attached. The visual container for a control or the collector of a set of child instances Inherited from Object (PRIM_OBJT)


CreateInstanceCreateInstance is signalled when an instance of a component is created Inherited from Object (PRIM_OBJT)
DestroyInstanceDestroyInstance is signalled when an instance of a component is about to be destroyed Inherited from Object (PRIM_OBJT)


AddAdd an item to the browser history
QueryString, Signal
GoBackNavigate to a prior URL
GoForwardNavigate to a subsequent URL
ReplaceReplace the current history item
QueryString, Signal

See also

All Component Classes

Technical Reference

LANSA Version 15, April 2020